It's really easy to judge from the other side but once you are in that person's shoe you will understand what she is going through.
No matter how nature or sensible she is, a person 's mind never really works in such situations. And that poor soul just got to know that every single person she considered to be her own isn't hers, she is literally having an identity crisis.
Also the way the secret came out in front of her she won't be thinking about how much love she got or what the first thing that comes to her mind is her parents are not her real parents, so who is her parents, where are they, what is her identity, why was she abandoned by her real family. All this!!
So let's not judge pooja what she did was totally human nothing dramatic or unrealistic